Table 4. Total fat and trans fatty acid intake of 225 Japanese subjects living in urban and rural areas^a of Japan.

	Women (n = 119)					Men (n = 106)
	Urban (n = 57)		Rural (n = 62)		P b	Urban (n = 51)		Rural (n = 55)		P b
	Mean	SD	Mean	SD		Mean	SD	Mean	SD
Total energy (kcal/day)	1803	306	1888	268	0.11	2310	371	2436	400	0.11
Total fat (g/day)	57.7	11.8	56.2	10.8	0.47	68.0	12.0	65.8	12.7	0.36
Total fat (% total energy)	28.8	3.0	26.8	3.5	0.001	26.6	3.5	24.4	3.2	0.001
Trans fatty acid (g/day)	1.8	0.8	1.6	0.6	0.03	1.9	0.7	1.6	0.6	0.04
Trans fatty acid (% total energy)	0.9	0.3	0.7	0.3	0.004	0.7	0.2	0.6	0.2	0.004
Trans fatty acid (% fat)	3.1	1.0	2.7	0.8	0.02	2.7	0.8	2.4	0.6	0.049

Abbreviation: SD = standard deviation.

^aAccording to population density,⁴⁵ 4 residential areas were grouped into urban (Osaka and Okinawa) and rural (Nagano and Tottori) areas.

^bDifferences between subjects in the 2 areas were tested by the unpaired t-test.